/*
* sets the colormap to Rainbow
*/
private void setColorModelRainbow() {
// Copy in the default colors
for (int i = 0; i < tableSize; i++) {
cm_red[i] = puke_red[i];
cm_green[i] = puke_green[i];
cm_blue[i] = puke_blue[i];
}
// Set rainbow for attribute colors
float maxHue = 0.8f;
float hue = 0;
float delta = maxHue / attrSize;
int rainbowColor;
for (int i = startColor; i <= endColor; ++i, hue += delta) {
rainbowColor = Color.HSBtoRGB(hue, 1.0f, 1.0f);
cm_red[i] = (byte) ((rainbowColor >> 16) & 0xff);
cm_green[i] = (byte) ((rainbowColor >> 8) & 0xff);
cm_blue[i] = (byte) ((rainbowColor >> 0) & 0xff);
}
colorModel = new IndexColorModel(8, tableSize, cm_red, cm_green, cm_blue);
}
/**
* Sets the selected color of this panel.
*
* <p>If this panel is in RED, GREEN, or BLUE mode, then this method converts these values to RGB
* coordinates and calls <code>setRGB</code>.
*
* <p>This method may regenerate the graphic if necessary.
*
* @param h the hue value of the selected color.
* @param s the saturation value of the selected color.
* @param b the brightness value of the selected color.
*/
public void setHSB(float h, float s, float b) {
if (Float.isInfinite(h) || Float.isNaN(h))
throw new IllegalArgumentException("The hue value (" + h + ") is not a valid number.");
// hue is cyclic, so it can be any value:
while (h < 0) h++;
while (h > 1) h--;
if (s < 0 || s > 1)
throw new IllegalArgumentException("The saturation value (" + s + ") must be between [0,1]");
if (b < 0 || b > 1)
throw new IllegalArgumentException("The brightness value (" + b + ") must be between [0,1]");
if (hue != h || sat != s || bri != b) {
if (mode == ColorPicker.HUE || mode == ColorPicker.BRI || mode == ColorPicker.SAT) {
float lastHue = hue;
float lastBri = bri;
float lastSat = sat;
hue = h;
sat = s;
bri = b;
if (mode == ColorPicker.HUE) {
if (lastHue != hue) {
regenerateImage();
}
} else if (mode == ColorPicker.SAT) {
if (lastSat != sat) {
regenerateImage();
}
} else if (mode == ColorPicker.BRI) {
if (lastBri != bri) {
regenerateImage();
}
}
} else {
Color c = new Color(Color.HSBtoRGB(h, s, b));
setRGB(c.getRed(), c.getGreen(), c.getBlue());
return;
}
Color c = new Color(Color.HSBtoRGB(hue, sat, bri));
red = c.getRed();
green = c.getGreen();
blue = c.getBlue();
regeneratePoint();
repaint();
fireChangeListeners();
}
}
/** Regenerates the image. */
private synchronized void regenerateImage() {
int size =
Math.min(
MAX_SIZE,
Math.min(
getWidth() - imagePadding.left - imagePadding.right,
getHeight() - imagePadding.top - imagePadding.bottom));
if (mode == ColorPicker.BRI || mode == ColorPicker.SAT) {
float bri2 = this.bri;
float sat2 = this.sat;
float radius = ((float) size) / 2f;
float hue2;
float k = 1.2f; // the number of pixels to antialias
for (int y = 0; y < size; y++) {
float y2 = (y - size / 2f);
for (int x = 0; x < size; x++) {
float x2 = (x - size / 2f);
double theta = Math.atan2(y2, x2) - 3 * Math.PI / 2.0;
if (theta < 0) theta += 2 * Math.PI;
double r = Math.sqrt(x2 * x2 + y2 * y2);
if (r <= radius) {
if (mode == ColorPicker.BRI) {
hue2 = (float) (theta / (2 * Math.PI));
sat2 = (float) (r / radius);
} else { // SAT
hue2 = (float) (theta / (2 * Math.PI));
bri2 = (float) (r / radius);
}
row[x] = Color.HSBtoRGB(hue2, sat2, bri2);
if (r > radius - k) {
int alpha = (int) (255 - 255 * (r - radius + k) / k);
if (alpha < 0) alpha = 0;
if (alpha > 255) alpha = 255;
row[x] = row[x] & 0xffffff + (alpha << 24);
}
} else {
row[x] = 0x00000000;
}
}
image.getRaster().setDataElements(0, y, size, 1, row);
}
} else if (mode == ColorPicker.HUE) {
float hue2 = this.hue;
for (int y = 0; y < size; y++) {
float y2 = ((float) y) / ((float) size);
for (int x = 0; x < size; x++) {
float x2 = ((float) x) / ((float) size);
row[x] = Color.HSBtoRGB(hue2, x2, y2);
}
image.getRaster().setDataElements(0, y, image.getWidth(), 1, row);
}
} else { // mode is RED, GREEN, or BLUE
int red2 = red;
int green2 = green;
int blue2 = blue;
for (int y = 0; y < size; y++) {
float y2 = ((float) y) / ((float) size);
for (int x = 0; x < size; x++) {
float x2 = ((float) x) / ((float) size);
if (mode == ColorPicker.RED) {
green2 = (int) (x2 * 255 + .49);
blue2 = (int) (y2 * 255 + .49);
} else if (mode == ColorPicker.GREEN) {
red2 = (int) (x2 * 255 + .49);
blue2 = (int) (y2 * 255 + .49);
} else {
red2 = (int) (x2 * 255 + .49);
green2 = (int) (y2 * 255 + .49);
}
row[x] = 0xFF000000 + (red2 << 16) + (green2 << 8) + blue2;
}
image.getRaster().setDataElements(0, y, size, 1, row);
}
}
repaint();
}